Mr Morgan, of Marsdale Road, said: “We wouldn’t mind waiting until November if we knew Michelle was then going to be given the drug.”

“It’s the uncertainty that’s unbearable – after waiting all those months we could be told she’s not eligible and we’re back to square one.”

Many MS patients across the UK face a similar battle to get Sativex.

Long delays in the NHS are often caused by patients pressing for treatments that doctors think unsuitable. But this may not be true of Sativex.

The MS Society has seen numerous cases where patients have won long battles to be prescribed Sativex and found it changed their lives.

Its head of campaigns Laura Weir said the charity had been “overwhelmed” by people struggling to get the drug.

She said: “It’s clear to us it’s a nationwide problem; there’s a real postcode lottery around accessing the treatment, even though it’s been thoroughly tested and could make a significant difference to a person’s quality of life.”

“We’d like to see Sativex widely available for all those who need it.”